add examples of how to customize serializers
add examples of how to customize serializers

nicobot/guides,knownasilya/guides,jkarsrud/guides,anthias/guides,bmac/guides,szines/guides,ubuntuvim/guides,bmac/guides,kevinkucharczyk/guides,davidpett/guides,SaladFork/emberjs-guides,davidpett/guides,SaladFork/emberjs-guides,anthias/guides,xymbol/guides,szines/guides,ubuntuvim/guides,HeroicEric/guides,jackfranklin/guides,skaterdav85/guides,knownasilya/guides,tleskin/guides,skaterdav85/guides,greyhwndz/guides,nicobot/guides,papilip/emberjs-guides-french,ubuntuvim/guides,jkarsrud/guides,skaterdav85/guides,MarkMT/guides,skaterdav85/guides,anthias/guides,vikram7/guides,grapho/guides,davidpett/guides,greyhwndz/guides,jackfranklin/guides,boztek/guides,tleskin/guides,grapho/guides,xymbol/guides,MarkMT/guides,davidpett/guides,kevinkucharczyk/guides,xymbol/guides,papilip/emberjs-guides-french,szines/guides,boztek/guides,vikram7/guides,knownasilya/guides,knownasilya/guides,tleskin/guides,MarkMT/guides,bmac/guides,MarkMT/guides,greyhwndz/guides,boztek/guides,jkarsrud/guides,bmac/guides,kevinkucharczyk/guides,jackfranklin/guides,nicobot/guides,ubuntuvim/guides,SaladFork/emberjs-guides,papilip/emberjs-guides-french,grapho/guides,jkarsrud/guides,vikram7/guides,HeroicEric/guides,HeroicEric/guides